Oh yeah, I sucked my grand pa's dick this one time. I was taking care of him and had to give him a sponge bath.
I noticed while I was soaping up his cock and balls he started to get hard, so I totally went for it. I sucked off my grand pa and he shot a delicious load in my mouth. My friend, like a fine wine, semen gets better with age.
After that, I used to stop by the Nursing home three times a week to get some of my grand pa's nut in my mouth. After his death, I still jerk off to the memories of sucking him off in his Hoverround.